发送ajax帖子时没有在php codeigniter中接收数据

Question

I'm trying to send data by post using ajax (with codeigniter) and I don't know why but I don't receive anything...

This is how I send it:

var sendData = $('#formContact').serialize();
$.ajax({
    type: 'POST',
    url: '<?php echo base_url()?>/intranet/update/updateProfile',
    data: sendData,
    dataType: 'json',
    success: function (data) 
    {
        console.log(data);
    },
    error: function (xhr, ajaxOptions, thrownError) {
        alert(xhr.status);
        alert(thrownError);
    }
});

and this is an example of my form:

<form id="formContact" action="update" method="POST">
    <input class="headInput" type="text" name="userName" value="Tito"/>
    <input class="headInput" type="text" name="userLastName" value="Lancreo"/>
    <input class="headInput" type="text" name="phone[]" value="666666"/>
    <input class="headInput" type="text" name="phone[]" value="111111"/>
    <input class="headInput" type="text" name="phone[]" value="222222"/>
</form>

And when I debug it, I always get 0...

[false, false, Array[0], false, null]

My controller:

$this->load->helper('form');
$this->load->library('form_validation');

//1 way
$ret=$this->input->post();

//2 way        
$return=$this->input->post(NULL, TRUE);

//3 way
$all=$_POST;
json_encode($all);

//4 way
$contact=$this->input->post("userName");

//return everything...
$var[0]=$return;
$var[1]=$contact;
$var[2]=$all;
$var[3]=$ret;
$var[4]=$data;
echo json_encode($var);

How can I fix it??

Answer 1

SOLVED!

The problem was not to replace with:

serialize().replace(/%5B%5D/g, '[]');

But I think it's usefull...

My problem was that I'm using a library for internationalization (https://github.com/bcit-ci/CodeIgniter/wiki/CodeIgniter-2.1-internationalization-i18n) and I must add language to my url, even if I change my routes.php

url: '<?php echo base_url()?>en/intranet/update/updateProfile'

Thanks a lot!